6 files changed, 73 insertions, 7 deletions
diff --git a/vendor/rayon/src/iter/extend.rs b/vendor/rayon/src/iter/extend.rs
index 1769d476b..a2645280f 100644
--- a/vendor/rayon/src/iter/extend.rs
+++ b/vendor/rayon/src/iter/extend.rs
@@ -500,6 +500,16 @@ impl ParallelExtend<String> for String {
     }
 }
 
+/// Extends a string with boxed strings from a parallel iterator.
+impl ParallelExtend<Box<str>> for String {
+    fn par_extend<I>(&mut self, par_iter: I)
+    where
+        I: IntoParallelIterator<Item = Box<str>>,
+    {
+        extend!(self, par_iter, string_extend);
+    }
+}
+
 /// Extends a string with string slices from a parallel iterator.
 impl<'a> ParallelExtend<Cow<'a, str>> for String {
     fn par_extend<I>(&mut self, par_iter: I)
diff --git a/vendor/rayon/src/iter/from_par_iter.rs b/vendor/rayon/src/iter/from_par_iter.rs
index 3240f32e2..49afd6cb8 100644
--- a/vendor/rayon/src/iter/from_par_iter.rs
+++ b/vendor/rayon/src/iter/from_par_iter.rs
@@ -6,6 +6,8 @@ use std::collections::LinkedList;
 use std::collections::{BTreeMap, BTreeSet, HashMap, HashSet};
 use std::collections::{BinaryHeap, VecDeque};
 use std::hash::{BuildHasher, Hash};
+use std::rc::Rc;
+use std::sync::Arc;
 
 /// Creates an empty default collection and extends it.
 fn collect_extended<C, I>(par_iter: I) -> C
@@ -31,6 +33,45 @@ where
     }
 }
 
+/// Collects items from a parallel iterator into a boxed slice.
+impl<T> FromParallelIterator<T> for Box<[T]>
+where
+    T: Send,
+{
+    fn from_par_iter<I>(par_iter: I) -> Self
+    where
+        I: IntoParallelIterator<Item = T>,
+    {
+        Vec::from_par_iter(par_iter).into()
+    }
+}
+
+/// Collects items from a parallel iterator into a reference-counted slice.
+impl<T> FromParallelIterator<T> for Rc<[T]>
+where
+    T: Send,
+{
+    fn from_par_iter<I>(par_iter: I) -> Self
+    where
+        I: IntoParallelIterator<Item = T>,
+    {
+        Vec::from_par_iter(par_iter).into()
+    }
+}
+
+/// Collects items from a parallel iterator into an atomically-reference-counted slice.
+impl<T> FromParallelIterator<T> for Arc<[T]>
+where
+    T: Send,
+{
+    fn from_par_iter<I>(par_iter: I) -> Self
+    where
+        I: IntoParallelIterator<Item = T>,
+    {
+        Vec::from_par_iter(par_iter).into()
+    }
+}
+
 /// Collects items from a parallel iterator into a vecdeque.
 impl<T> FromParallelIterator<T> for VecDeque<T>
 where
@@ -174,6 +215,16 @@ impl FromParallelIterator<String> for String {
     }
 }
 
+/// Collects boxed strings from a parallel iterator into one large string.
+impl FromParallelIterator<Box<str>> for String {
+    fn from_par_iter<I>(par_iter: I) -> Self
+    where
+        I: IntoParallelIterator<Item = Box<str>>,
+    {
+        collect_extended(par_iter)
+    }
+}
+
 /// Collects string slices from a parallel iterator into a string.
 impl<'a> FromParallelIterator<Cow<'a, str>> for String {
     fn from_par_iter<I>(par_iter: I) -> Self
diff --git a/vendor/rayon/src/iter/mod.rs b/vendor/rayon/src/iter/mod.rs
index e60ea1633..7b5a29aeb 100644
--- a/vendor/rayon/src/iter/mod.rs
+++ b/vendor/rayon/src/iter/mod.rs
@@ -1547,7 +1547,7 @@ pub trait ParallelIterator: Sized + Send {
 
     /// Computes the maximum of all the items in the iterator with respect to
     /// the given comparison function. If the iterator is empty, `None` is
-    /// returned; otherwise, `Some(min)` is returned.
+    /// returned; otherwise, `Some(max)` is returned.
     ///
     /// Note that the order in which the items will be reduced is not
     /// specified, so if the comparison function is not associative, then
@@ -2392,7 +2392,7 @@ impl<T: ParallelIterator> IntoParallelIterator for T {
 #[allow(clippy::len_without_is_empty)]
 pub trait IndexedParallelIterator: ParallelIterator {
     /// Collects the results of the iterator into the specified
-    /// vector. The vector is always truncated before execution
+    /// vector. The vector is always cleared before execution
     /// begins. If possible, reusing the vector across calls can lead
     /// to better performance since it reuses the same backing buffer.
     ///
@@ -2401,7 +2401,7 @@ pub trait IndexedParallelIterator: ParallelIterator {
     /// ```
     /// use rayon::prelude::*;
     ///
-    /// // any prior data will be truncated
+    /// // any prior data will be cleared
     /// let mut vec = vec![-1, -2, -3];
     ///
     /// (0..5).into_par_iter()
@@ -2414,7 +2414,7 @@ pub trait IndexedParallelIterator: ParallelIterator {
     }
 
     /// Unzips the results of the iterator into the specified
-    /// vectors. The vectors are always truncated before execution
+    /// vectors. The vectors are always cleared before execution
     /// begins. If possible, reusing the vectors across calls can lead
     /// to better performance since they reuse the same backing buffer.
     ///
@@ -2423,7 +2423,7 @@ pub trait IndexedParallelIterator: ParallelIterator {
     /// ```
     /// use rayon::prelude::*;
     ///
-    /// // any prior data will be truncated
+    /// // any prior data will be cleared
     /// let mut left = vec![42; 10];
     /// let mut right = vec![-1; 10];
     ///
diff --git a/vendor/rayon/src/iter/par_bridge.rs b/vendor/rayon/src/iter/par_bridge.rs
index 8398274b3..eb058d3e6 100644
--- a/vendor/rayon/src/iter/par_bridge.rs
+++ b/vendor/rayon/src/iter/par_bridge.rs
@@ -13,6 +13,11 @@ use crate::{current_num_threads, current_thread_index};
 /// `par_iter` instead. However, it can still be useful for iterators that are difficult to
 /// parallelize by other means, like channels or file or network I/O.
 ///
+/// Iterator items are pulled by `next()` one at a time, synchronized from each thread that is
+/// ready for work, so this may become a bottleneck if the serial iterator can't keep up with the
+/// parallel demand. The items are not buffered by `IterBridge`, so it's fine to use this with
+/// large or even unbounded iterators.
+///
 /// The resulting iterator is not guaranteed to keep the order of the original iterator.
 ///
 /// # Examples
diff --git a/vendor/rayon/src/iter/product.rs b/vendor/rayon/src/iter/product.rs
index a3d0727f9..e081be06b 100644
--- a/vendor/rayon/src/iter/product.rs
+++ b/vendor/rayon/src/iter/product.rs
@@ -13,7 +13,7 @@ where
 }
 
 fn mul<T: Product>(left: T, right: T) -> T {
-    iter::once(left).chain(iter::once(right)).product()
+    [left, right].into_iter().product()
 }
 
 struct ProductConsumer<P: Send> {
diff --git a/vendor/rayon/src/iter/sum.rs b/vendor/rayon/src/iter/sum.rs
index a73e0bf3d..ddae810f9 100644
--- a/vendor/rayon/src/iter/sum.rs
+++ b/vendor/rayon/src/iter/sum.rs
@@ -13,7 +13,7 @@ where
 }
 
 fn add<T: Sum>(left: T, right: T) -> T {
-    iter::once(left).chain(iter::once(right)).sum()
+    [left, right].into_iter().sum()
 }
 
 struct SumConsumer<S: Send> {